20x20x4 MERV 13 Puracell II, Plastic Frame Box Style, Synthetic MediaPUPFSB202042O $221.00 SKU: PUPFSB202042O Back $221.00 Quantity -+ Add to Cart Details 20x20x4 MERV 13 Puracell II, Plastic Frame Box Style, Synthetic Media DetailsBackDetails20x20x4 MERV 13 Puracell II, Plastic Frame Box Style, Synthetic MediaSee MoreSee Less